What is the maximum needle speed
A sewing machine needle moves with a rapid vibratory motion, rather like SHM, as it sews a seam. Suppose the needle moves 8.2 mm from its highest to its lowest position and it makes 27 stitches in 8.5 s. What is the maximum needle speed?
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You can determine the speed of a moving bullet by allowing the bullet to pass through two rotating paper disks mounted a distance.
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A point charge 9.00 {rm nC} is at the center of a cube with sides of length 0.180 {rm m}. What is the electric flux through the surface of the cube?
Suppose the needle moves 8.2 mm from its highest to its lowest position and it makes 27 stitches in 8.5 s. What is the maximum needle speed?
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A circular loop in the plane of the screen lies in a 0.72 T magnetic field pointing into the screen. The loop's diameter changes from 18.5 cm to 6.0 cm in 0.50 s. What is the magnitude of the average induced emf?
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